Water Supply Plan - City of Miami

Water Facilities Master Plan
Existing Water Supply Facilities
A 3-4
KM2740.Sec3.doc
11/26/2007
3.1.2.3 Miami-Springs Wellfield
The twenty active wells located in the Miami Springs Wellfield were constructed
between 1924 and 1954. These wells are 14 inches and 30 inches in diameter, 80 to 90
feet deep and have casing depths of 80 feet. The total wellfield capacity is 79.30 mgd
or 55,070 gpm (ranging between or 2,500 and 5,000 gpm for each well).
3.1.2.4 Northwest Wellfield
The Northwest Wellfield has fifteen active wells that were constructed in 1980. The
wells are 40 inches and 48 inches diameter and 80 to 100 feet deep, with casing depths
ranging from 46 to 57 feet. These wells have two-speed motors. The total nominal
capacity of the wells at the low speed flow rate is 149.35 mgd. The capacity of each
well, except well No. 10, is 10 mgd at the low speed flow rate. Well 10 have a low
speed capacity of 9.35 mgd. The total nominal capacity for the wells at the high speed
flow is 220.94 mgd.
3.1.2.5 Medley Wellfield
The Medley wellfield had previously been abandoned. However, four wells were
recently rehabilitated for emergency use only. The wells are 42 inches and 48 inches
in diameter and 100 to 115 feet deep, with casing depths ranging from 42 to 48 feet.
The total wellfield capacity is 43.20 mgd or 30,000 gpm (7,500 gpm for each well).
3.1.3 Alexander Orr, Jr. Subarea Wellfields
The Alexander Orr, Jr. WTP is supplied by four water supply wellfields as shown on
Figure 3-1. The total designed installed capacity from the four wellfields in the
Alexander Orr, Jr. service area is approximately 308 mgd. There are Floridan aquifer
wells at two of the wellfields. Appendix A provides detailed information about well
construction and capacities, of the Alexander Orr, Jr. area wellfields.
3.1.3.1 Alexander Orr, Jr. Wellfield
The ten active wells located in the Alexander Orr, Jr. Wellfield were constructed
between 1949 and 1964. These wells are 16 inches and 42 inches in diameter, 100 feet
deep and have casing depths ranging from 40 to 50 feet. The capacity of the wellfield
is 74.4 mgd (ranging between 4,170 and 7,500 gpm for each well). Because this
wellfield is closest to saline water, there exist the potential for saltwater intrusion, as
has occurred in the past. Improvements to a control structure on the C-2 Canal has
assisted in reducing saltwater intrusion in recent years.
3.1.3.2 Snapper Creek Wellfield
The four active wells located in the Snapper Creek Wellfield were constructed in 1976.
These wells are 24 inches in diameter, 108 feet deep and have casing depths of 50 feet.
The total wellfield capacity is 40.0 mgd or 27,760 gpm (6,940 gpm for each well).